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        <h1>Vue动态路由</h1>
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    <a><i class="nexmoefont icon-calendar-fill"></i>2020年04月05日</a>
    <a><i class="nexmoefont icon-areachart"></i>611 字</a>
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  <article>
    <p>上周在做项目时，遇到一个需求，根据登录用户的权限，动态分配路由。只让他看到某些有权限的页面。捣鼓了半天，这里做一个总结。</p>
<a id="more"></a>
<h1 id="动态路由方法"><a href="#动态路由方法" class="headerlink" title="动态路由方法"></a>动态路由方法</h1><p>首先要知道添加动态路由需要使用到的方法 <code>router.addRoutes</code>, 其中<code>routes</code> 是代表符合路由数组，格式和常规的路由数组是一样的。</p>
<p>包含基本的 <code>path</code>,<code>component</code> 等参数。</p>
<pre><code class="JavaScript">// 参数必须是一个符合 routes 选项要求的数组。
router.addRoutes(routes: Array&lt;RouteConfig&gt;)
</code></pre>
<h1 id="遇到的问题"><a href="#遇到的问题" class="headerlink" title="遇到的问题"></a>遇到的问题</h1><p>在后台请求到此用户的路由权限列表后，我们需要把这个路由添加到路由列表中。但是后台传给我 <code>component</code> 属性是个字符串，并不是指向组件的对象。</p>
<p>最大的难点应该就是这里了。我们需要把当前的<code>component</code> 中的字符串解析成我们需要的组件对象。</p>
<p>我们可以这么去定义，如果我们解析到的路由列表是如下数组：</p>
<pre><code class="JSON">// 模拟请求到的数组
{
  data: {
    routerMap: [{
      path: &#39;/&#39;,
      name: &#39;HelloWorld&#39;,
      component: &#39;HelloWorld&#39;,
      mate: {
        name: &#39;首页&#39;,
        icon: &#39;el-icon-menu&#39;
      },
      children: [{
          path: &#39;menus-1&#39;,
          component: &#39;Menus1&#39;,
          mate: {
            name: &#39;菜单 1&#39;,
            icon: &#39;el-icon-s-goods&#39;
          }
        },
        {
          path: &#39;menus-2&#39;,
          component: &#39;Menus2&#39;,
          mate: {
            name: &#39;菜单 2&#39;,
            icon: &#39;el-icon-user-solid&#39;
          }
        }
      ]
    }]
  }
}
</code></pre>
<p>那么我们可以这么去做，先定义好 <code>component</code> ，然后再写一个方法，直接我们定义好的对象。</p>
<pre><code class="JavaScript">// routerMap.js

// 懒加载路由
const HelloWorld = () =&gt; import(&#39;@/components/HelloWorld&#39;)
const Menus1 = () =&gt; import(&#39;@/views/menus-1/Menus-1&#39;)
const Menus2 = () =&gt; import(&#39;@/views/menus-2/Menus-2&#39;)

// 查找路由，将字符串的component和对象的component对应起来
export const routerConfigMap = {
  &#39;HelloWorld&#39;: HelloWorld,
  &#39;Menus1&#39;: Menus1,
  &#39;Menus2&#39;: Menus2
}
</code></pre>
<p>接下里我们要将我们请求到的数组做一下处理和过滤</p>
<pre><code class="JavaScript">import {routerConfigMap} from &#39;@/router/routerMap&#39;
</code></pre>
<pre><code class="JavaScript">// 添加路由
addRouter () {
    // ...请求到的路由 = routerMap
    let routerList = this.filterRouter(routerMap)
    this.$router.addRoutes(routerList)
}
// 过滤整理路由
filterRouter (routerMap) {
  routerMap.forEach(item =&gt; {
    item.component = routerConfigMap[item.component]
    if (item.children) {
      // 如果有子路由则继续这一步操作
      return this.filterRouter(item.children)
    }
  })
  return routerMap
}
</code></pre>
<p>这样就完成添加路由步骤。</p>
<p>核心代码已经列出，具体详情代码已经上传 GitHub。</p>
<p>👉<a href="https://github.com/mraing/vue-addRouter" target="_blank" rel="noopener"> 前往 GitHub 下载 Demo</a>👈</p>
<p>如果需要根据权限进行过滤，那么在<code>filterRouter</code>函数中可以根据自己的需求进行处理。</p>

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